At Wed, 23 Sep 2009 16:33:06 +0200, Elimar Riesebieter wrote:
Hi folks,
are there any contradictions to enable-msi=1 by default?
MSI is broken on some platforms. IIRC, almost all non-Intel platforms didn't work until the recent ones. So, it can't be enabled blindly as default, unfortunately.
There are users with chips like an
00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) Subsystem: Hewlett-Packard Company Device 30f7 Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin B routed to IRQ 33 Region 0: Memory at dc500000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: HDA Intel
which only works with MSI. And it is somewhat hard to find the appropriate Documantation in HD-Audio.txt.
A patch is always welcome.
2nd it will be very hard for Distributers to maintain modul options by chip ID's.
It's not a question for distributors but the upstream maintainers to maintain the quirk table :)
thanks,
Takashi